Pump.



R. Nl. NICHOLS.

PUMP.

APPLICATION FILED FEB. II. |914.

1 l 53, l 6 1 Patented Sept. 14, 1915.

3 SHEETS-SHEET I.

.IIIl-lllllllllllllllllllllil COLUMBIA PLANoaRAPu c0..wAsH|NcI'roN. D.c.

R. M. NICHOLS.

PUMP.

3 SHEETS-SHEET 2.

in' E555 M .*pLuMpm PLANunRAPH co.. wAsmNu'roN, u. c.

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52. 62 v1 l 2.7. 29 ll /ZQ 30 :IIL 50' 39' u l f?. 1 2o B f Q2 s) Z 21145211555 /f/v/ @l APPLICATION FILED FEB-11.1914.

PUMP.

COLUMBIA PLANOGRAPK CO.. WASHINGTON, D. C.

Patented Sept. 14, 1915.

3 SHEETS-SHEET 3.

TFB TATFS FAFFNFF OFFEQE.

ROBERT M. NICI-IOLS, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOB 0FONE-FOURTH TO THOMAS WILLIALIIS, OF SAN FRANCISCO, CALIFORNIA, ANDONE-FOURTH TO WALTER S. CHAPMAN, OF OAKLAND, CALIFORNIA.

PUMP.

Application filed February 11, 1914.

To all whom t may concern Be it known that I, ROBERT M. NICHOLS, acitizen of the United States, and residing in the city and county of SanFrancisco and State of California, have invented a new and usefulImprovement in Pumps, of which the following is a specification.

My invention relates to deep well pumps wherein a double Valved hollowpiston is operated by a hollow piston rod for the purpose of forcingliquid from the cylinder in which the said piston reciprocates throughthe said hollow piston rod, the said piston rod and piston being alsoarranged to disconnect and elevate the cylinder and valve f the pump,and the objects of my invention are first, to provide improved meanswhereby liquid may be forced through the hollow piston rod during theupward as well as the downward stroke of the said piston rod; second, toprovide improved means whereby the cylinder and foot valve may beremoved and brought to the surface; and third, to providey improvedmeans whereby the upper valve may be removed and brought to the surface.I accomplish these several features by means of the mechanismillustrated in the drawings forming a part of the present specification,wherein like characters of reference designate similar parts throughoutthe said specification and drawings, and in which- Figure l iS a brokensectional view of the well casing, the pump casing and the cylinderdisclosing the position of the several parts as they would appear duringthe downward stroke of the hollow piston, the arrows indicating thedirection of the flow of liquid in the various parts or chambers of thepump. Fig. 2 is a view similar to Fig. 1 excepting that the well casingis not shown and indicating` the position of the several parts duringthe upward stroke of the hollow piston and piston rod. Fig. 3 is abroken sectional view of the pump disclosing the manner in which thecylinder is engaged by `the lower portion of the hollow piston for thepurpose of disconnecting the said cylinder from the pump casing. Fig. 4.is a vertical sectional view of the pump casing and the cylinder, thepiston and upper valve being shown in elevation and disclosing themanner in which the said uppervalveis engaged by the hollow pistonSpecification of Letters Patent.

Patented Sept. 1d, 1915.

Sera1No.819,097.

rod and disengaged from the pump. Fig. 5 is a view of the double valve,partly in secti on, which is slida-bly mounted within the hollow piston.Fig. G is a bottom view of the double valve. Fig. 7 is a planA viewthereof. Fig. 8 is a bottom view of the male coupling between the pumpcasing andv the cylinder. Fig. 9' is a plan view of the upper valve, andFig. l0 is a plan view of the female coupling between the pump casingand the cylinder, disclosing the beveled seat and the arcuate channelstherein.

Briefly, the device consists of a cylinder secured, by means of adetachably connected male and female coupling, to the lower end of thepump casing. The cylinder is provided with a foot valve and an uppervalve. A hollow piston rod extends through a suitable sleeve in theupper valve in the upper head of the pump and has secured toits lowerend a hollow piston having a double valve slidably mounted therein.During the downward stroke of the hollow piston rod,

liquid is displaced from the cylinder below the piston and forced intothe smaller diameter of the hollow piston rod. Simultaneously, liquid isdrawn into the cylinder above the piston, which liquid is displaced bythe upward stroke of the piston and forlced upward through the hollowpiston roc.

rEhe invention consists in the novel and effective means whereby one setofy valves is opened and the other set closed during each stroke of thepiston to the end that the liquid is drawn into one end of the cylinderduring one stroke and displaced and forced through the hollow piston rodduring the successive stroke. Also novel means whereby the upper headand the valves therein and the cylinder may be disconnected from thepump and brought to the surface by the hollow piston rod.

Referring to the drawings, the numeral 1 is used to designate the wellcasing which extendsy from the-bottom of the well to the top thereof. Apump casing 2 extends from the top of the well to a point near thebottom thereof. casing is secured in any suitable manner the femalecouplingy l having a beveled seat 5 and the arcuate channels 6 with theAslots 7 therein. A male coupling 8 is provided with; a beveled flange 9arranged to be seatedy To the bottom of' the pump within the beveledseat 5 of the coupling 4. The male coupling 8 is also provided with thediametrically opposed lugs 10 which are arranged to enter the slots 7and engage the arcuate channels 6 of the female coupling 4.

A sleeve 12, having a vertical or longitudinal slot 14 with ay lateralslot l5 connected therewith, is provided with a head 16 havare adaptedto close thev apertures 17 dur-l ing the upward stroke of the piston 32.l

A cylinder 2O is secured to the lower end of the male coupling 8, whilea suitable foot valve 21, having the usual ball 22 therein is secured tothelowcr en d of the cylinder 20. The usual cage above the ball 22 isprovided with` a rectangular extension 23. i

Ahollow piston rod 24 depends from the .top of the well and is slidablymounted in the sleeve 12. A pin 25 is secured to the piston rod 24 andis adapted to engage the slot 14 and connection 15 thereof, within thesleeve l2. To the lower end of the hollow piston rod 24 is secured thehollow piston 27 which is provided with the internal beveled seat 28having ports 29 therein. rllhe piston 27 has an enlarged po-rtion 30which is.

rigidly secured within the piston-sleeve 32 by means of the threadeddisk 35. The said disk 35 has a seat 36 therein and a hollow rectangularextension 37, beveled at the internal lower edges thereof so that thesaid hollow rectangular extension 37 may easily engage the rectangularextension 23 of the foot valve 21.

A stem 38 is slidably mounted within the hollow piston 27 and the disk35 and has rigidly securedthereto the lower valve 39, adapted to engagethe seat 36 of the disk 35, and the upper hollow valve 40 adapted toengage the seat 28 of the hollow piston 27. When the valve 39 is restingon the seat 35 the hollow valve 40 is away from the seat 28 and theports 29 are open. Conversely, when the hollow valve 40 is on the seat27 the ports 28 are closed and the valve 39 is away from its seat 35.

The opera-tion of the pump is as follows: We will assume that thecylinder is full of liquid. During the downward stroke of the hollowpiston rod 24 and the hollow valve 27 and sleeve 32 secured thereto, thediameter of the cylinder 20 being greater than that of thesaidV pistonrod 24, the liquid in the said cylinder 20 and below the piston 27 andsleeve-32 therein, will be displaced by the said downward stroke andforced into the said hollow piston 27 and piston rod 24. During itspassage therethrough the pressure of the liquid will raise lthev valve39 from its seat and consequentlyV seat the valve 40 on theA seat 28,thereby Yclosing the ports 29. The pressure-of the liquid will also acton the under surface of the hollow valve 40 and thereby greatly assistin keeping the ports 29 closed. the liquid will be drawn through theapen tures 3 of the pump casing 2, and through the apertures 17 of thehead 16 and into the cylinder 2O above the piston 27 Vand the sleeve 32.The suction occasioned thereby will also actv on the valve 40'throughthe ports 29 and further assist in keeping the said valve 40 to itsVseat 28. The position of the several valves is shown and the direc-Simultaneously,

tion of the flow of the liquid during the downward stroke of the piston27 and sleeve 32 is indicated by the arrows in Fig. 1 of the drawings.

During the upward stroke of the piston 27 and sleeve`32 the pressure ofthe water will open the valve 40 and ports 29, and conse# quently Vclosethe valve 39, close Vthe apertures 17 inthe upper valve in the head`16by means of the balls 19, and unseat the ball 22 of the foot valve 21.The liquid will then be drawn into the cylinder through the.`

foot valve 21 and into the cylinder 2O below the piston 27 and thesleeve 321 thereof. Si-

multaneously, the liquidin the cylinder 20v and above the piston27 willbe displaced `V by the rising slceve'32 and piston 27 and pump casingthe piston rod 24 is removed vwill thereby be forced upwardthrough the1ro Y from the reciprocating means' and lowered until the hollowrectangular extension 37 engages the rectangular Vextension 23 of thefoot valve 21. The pin 25 on the rod 24 is then in the lowjer end oftheslot 14. The piston rod 24is then turned which also turnsA the cylinder20 and the male coupling 8 until the lugs 10 on the said coupling 8traverse the length of the arcuate channels 6, see` Fig. 10 ofthedrawings, and are brought below the slotsV 7. The piston 27 and sleeve32 thereon areV then slowly'v raised -until the upper end of thesaid'sleeve en-V counters the flange V18 on the sleeve 12. In thisposition the sleeve 12, head 16 and male coupling 8 will be resting onthe said sleeve.

l2. A further upward movement will lift the lugs 10 through the slots 7and all of the parts .excepting the pumpk casing 2 and the Y femalecoupling 4, may be brought t0 the surface. The internal edges yofthehollow rectangular extension 37 are beveled for the purpose offacilitating the ,engagementof the said extension 37 with the kextension23 of the foot valve 21.

ln order to disengageand raise theupper valve, consisting of the sleeve12 and head 1G thereon, without disturbing the other parts, the pistonrod 24. is lowered until the pin 25 thereon enters the slot 14 of thesleeve 12 and rests opposite the lateral eX- tension 15 therein. Whilein this position the extension 37 is still above the extension so thatthere will be no engagement of the said extensions. By rotating thepiston rod 2a to the left, the pin 25 thereon will enter the lateralslot l5 and unscrew the head 1G from the male coupling 8. As Soon as thesaid head 1G is free from the coupling 8, the head 16 may be raised tothe surface by means of the piston rod 24. For the purpose offacilitating the reinsertion of the head 1G the lower edges of the saidhead as well as the upper internal edges of the male coupling 8 arebeveled. The upper internal edge of the cylinder 20 is also beveled sothat the sleeve 32 of the piston 27. may be easily and readily insertedtherein.

1 am aware that the present state of the art discloses double actingpumps having hollow pistons and similar in operation to the presentinvention, therefore I donotwish to claim such a combination broadly,but

ll claim:

1. rEhe combination, in adouble acting pump, of a suitable pump casing;a cylinder having a suitable foot valve therein and .de tachably securedto the pump casing; an upper head; a hollow piston rod operating throughthe upper head; means secured to the hollow piston rod arranged toengage and detach the upper head; and a hollow piston secured to thehollow piston rod and arranged to engage the foot valve and to detachthe cylinder from the pump casing.

2. The combination, in a double acting pump, of a suitable pump casing;a cylinder detachably secured to the pump casing and having a suitablefoot valve with a rectangular extension thereto; an upper head above thecylinder; a hollow piston rod operating through the upper head; meanssecured to the hollow piston rod and arranged to engage and detach theupper head; and a hollow piston arranged to engage the rectangularextension on the foot valve and to i detach and raise the cylinder fromthe pump casing.

3. The combination, with a double acting pump, of a suitable pumpcasing; a cylinder detachably secured to the pump casing and having asuitable foot valve on the lower end of the said cylinder with arectangular extension; an upper head detachably secured above thecylinder and having a vertical slot with a lateral extension thereto; ahollow piston rod operating through the upper head and having a pinthereon arranged to ,engage the lateral extension of the slot within theupper head and to detach and raise the said head; a hollow pistonsecured to the lower end of the piston rod and having Lupper and lowervalve seats and ports in the upper seat thereof, said piston beingadapted to engage the rectangular eX- tension of the foot valve on thecylinder and to discngage and raise the said cylinder from the pumpcasing; and a double valve slidably mounted within the hollow piston andarranged to engage the upper seat and close the ports therein during thedownward stroke of the piston and to engage the lower seat during theupward stroke of the piston.

t. rThe combination, in a double acting pump, of a suitable pump casing;a cylinder detachably secured to the pump casing and having a foot valveat the lower end thereof with a rectangular extension thereto; an

upper head having a valve therein detachably secured above the cylinderand having` a sleeve with a vertical slot having a lateral extensiontherein; a hollow piston rod operating through the sleeve of the upperhead; a suitable pin secured to the hollow piston rod and arranged toengage the lateral eX- tension of the slot within the sleeve of the`upper head and to disengage and raise the said upper head; a hollowpiston having upper and lower seats therein and ports in the said upperseat; a stem slidably mounted within the hollow piston; a hollow conicalvalve secured near the upper end of the stem; a solid valve secured nearthe lower end of the stem, said hollow valve being adapted to vclose theports in the upper seats and raise the solid valve from the lower seatduring the downward stroke of the hollow piston and to seat the lowervalve and remove the upper hollow valve from the upper seat and uncoverthe ports therein duringthe upward stroke of the piston; and a vhollowrectangular extension secured to the lower end of the hollow piston andadapted to engage the rectangular extension of the foot valve and todisengage the cylinder from the pump casing.

5. The combination, in a double acting pump, of a suitable pump casing;a female coupling secured to the pump casing; a male coupling arrangedto engage a female coupling; an upper head having apertures therein anda sleeve thereon, said 'sleeve being provided with a vertical slothaving a lateral extension thereto. the said head being detachablysecured to the male coupling; a cylinder rigidly secured to the malecoupling; a foot valve rigidly Secured to the cylinder and having arectangular extension thereto; a hollow piston rod operating through thesleeve of the head secured to the' male coupling; a pin secured tothepiston Irod'and adapted to engage the lateral eX- tension of the slotwithin the sleeve of theV Hangs and disengage the same from the'malevvcoupling; a hollow piston secured to the piston rod and having an upperand lower .seat therein and ports within the said Vupper gage thecylinder and the male coupling from the female coupling.

Y 6. The combination, in a double actingpump, of a suitable pump casinghaving apertures therein; a cylinder detachably secured to the pumpcasing; a suitable footl valve secured to and inclosing the lower end ofthe cylinder; an upper head having a valve therein secured above thecylinder; a hollow piston rod operating thro-ugh the upper head; meanssecured to the said rod adapted to disengage and raise the Vupper head;a hollow piston slidably mounted within the cylinder andY having anupperV and a lower seat therein and ports in the upper seat; meanssecured to the hollow piston and adapted to disengage the cylinder fromthe pump casing; a double valve consisting of an upper hollow and alower solid valve slidably mounted within the hollow piston and adaptedto close the ports in the hollow piston andto draw liquid into the upperpart of the cylinder through the upper valve and to open the lowervalve, close the foot Y valve and force the liquid in the lower end of Ithe cylinder through the lower valve seat in the hollow piston andupward through the hollow piston rod during the downward stroke of thepiston, and .to open the ports and close the lower valve in the hollowpiston and draw liquid through the foot valve into the cylinder belowthe piston and to close the upper valve and force the liquid in thecylinder above Ythe piston through the ports in the said piston andupward through the hollow piston rod during the Vupward stroke-of thepiston.' Y l 7. The combination, in a double acting pump, 'of a suitablepump casing having apertures therein; a female coupling having r abeveled seat and arcuate channelsending in vertical slots therein; aVmale coupling having a beveled iange arranged to engage the beveledseatand lugs' adapted to enter the slots and the arcuate channels of the e-`male coupling; an upper head having a'valve therein and a sleeveprovided with a vertical slot with a lateral extension thereto,detachably secured within the male coupling;

a hollow piston rod operating through they tangular extension thereto; aApiston sleeve f slidably mounted within the cylinder; a hollowpiston'secured to the sleeve and to the lower end of the hollow pistonrod, said hollow pistonl having an upper and a lower seat andV ports inthe said upper seat; and a hollow rectangular extension adapted toengage the rectangular extension of the foot valve and to rotate thesame until the lugs kon the male coupling traverse the arcuate channelstherein and lie below the slots in the ends of the saidv channels; and adouble valve consisting of a hollow upper and a lower solid Y l valveslidably mounted within the hollow piston and adapted to cover the portsin the upper seat and raise the lower valve from its `seat during thedownward stroke of the hollow piston', and to uncover the ports and tolower the solid valve to its seat in the 'hollow piston during theupward stroke of the said piston.

In witness whereof I hereunto set my signature in the presence of twosubscribing witnesses.

' ROBERT M. NICHOLS.` vVitnessesz f GEORGE M. HENCH, KARL ESCHULTZ.

Copies of this patent may be obtained Vfor five cents each,v byaddressing the Commissioner ofPatents,

Washington, D. C. Y

